During the YPN Beta, YPN is only available to US Citizens and they will actually ban your account if your sending too much foreign traffic. Therefore, I have implemented geo-targeting into my site so it shows google ads to non-US Citizens.
Having done Adwords to Adsense & now Adwords to yahoo arbitrage I say that Yahoo definately pays 4-5 times more per click. However, the epc has dropped somewhat since Sunday. getting much lower profit for my advertising dollars yesterday & the day before. Hopefully it will move back to the normal higher epc's soon.
This is an update I just got from Yahoo. On October 10th, they implemented phase 3 of their "quality based pricing", this could be why some of our partners have seen a drop in revenue since the 10th. This only seems to have affected some of our partners, but it is across all Yahoo based parking companies. I will update everybody as I know more. Donny" http://www.namepros.com/326844-parked-com-36.html
When YPN first opened up i joined them and their pay was INSANELY higher then Adsense. Talking about 30-50 dollars a click. Consistently. Over the course of about a year following the launch, the payout become decreasingly smaller but still a few higher then AdSense. In short- yes YPN pays more, but the targeting is horrible, so your CTR will suffer. Now if your site doesn't rely on targeting and is pretty broad on subjects, then YPN might be do well for you. Test it, see how it goes. I still remember when my Ferrari site was up and an ad for a musician with the last name Ferrari came up... needless to say, not many people were going to click that.
I get about the same amount of money from YPN as I did with Adsense. I get more clicks with Adsense but more RPC with YPN so it evens out.
For my site type, yahoo pays about, meh, 10 times more per click than google. Then again, google takes the cake for the search ads at around 1 buck per click.
The only way to determine it exactly will be to put yahoo ads on your site and see what happens after 1 month. Than put adsence or why not Ask/Adbrite/MSn text ads and compare? Then U can choose the option that pays the most.
We cant just tell you if YPN will work for you. It depends on many things, such as what your site content is as different keywords have different adds, different adds have different CPC. I suggest you try adsense, then try YPN and compare your results and come to your own conclusion.
adsense looks pretty, yahoo does not have the image type of ads (am I correct?). But my adsense sometimes has only 0.01 while yahoo at least pays 0.10